Fix 1896557. Allow a subcanvas to be used multiple times at different time offsets.

git-svn-id: http://svn.voria.com/code@1753 1f10aa63-cdf2-0310-b900-c93c546f37ac

diff --git a/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp b/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp
index e5fee0d..572aee2 100644 (file)
--- a/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp
+++ b/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp
@@ -144,6 +144,18 @@ Layer_PasteCanvas::get_param_vocab()const
                .set_local_name(_("Children Lock"))
        );
 
+       // optimize_layers() in canvas.cpp makes a new PasteCanvas layer
+       // and copies over the parameters of the old layer.  the
+       // 'curr_time' member wasn't being copied, so I've added it as a
+       // hidden, non critical parameter, and now it will be.  this
+       // allows a single exported subcanvas to be used more than once at
+       // a time, with different time offets in each.  see bug #1896557.
+       ret.push_back(ParamDesc("curr_time")
+               .set_local_name(_("Current Time"))
+               .not_critical()
+               .hidden()
+       );
+
        return ret;
 }
 
@@ -183,6 +195,7 @@ Layer_PasteCanvas::set_param(const String & param, const ValueBase &value)
 
        IMPORT(children_lock);
        IMPORT(zoom);
+       IMPORT(curr_time);
 
        return Layer_Composite::set_param(param,value);
 }
@@ -249,6 +262,7 @@ Layer_PasteCanvas::get_param(const String& param)const
        EXPORT(zoom);
        EXPORT(time_offset);
        EXPORT(children_lock);
+       EXPORT(curr_time);
 
        EXPORT_NAME();
        EXPORT_VERSION();
@@ -322,9 +336,6 @@ Layer_PasteCanvas::accelerated_render(Context context,Surface *surface,int quali
        if(!canvas || !get_amount())
                return context.accelerated_render(surface,quality,renddesc,cb);
 
-       if(muck_with_time_ && curr_time!=Time::begin() && canvas->get_time()!=curr_time+time_offset)
-               canvas->set_time(curr_time+time_offset);
-
        SuperCallback stageone(cb,0,4500,10000);
        SuperCallback stagetwo(cb,4500,9000,10000);
        SuperCallback stagethree(cb,9000,9999,10000);
@@ -344,6 +355,9 @@ Layer_PasteCanvas::accelerated_render(Context context,Surface *surface,int quali
        else if (!context.accelerated_render(surface,quality,renddesc,&stageone))
                return false;
 
+       if(muck_with_time_ && curr_time!=Time::begin() && canvas->get_time()!=curr_time+time_offset)
+               canvas->set_time(curr_time+time_offset);
+
        Color::BlendMethod blend_method(get_blend_method());
        const Rect full_bounding_rect(canvas->get_context().get_full_bounding_rect());